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Title: Fusion-fission of {sup 16}O+{sup 197}Au at sub-barrier energies.

Abstract

The recent discovery of heavy-ion fusion hindrance at far sub-barrier energies has focused much attention on both experimental and theoretical studies of this phenomenon. Most of the experimental evidence comes from medium-heavy systems such as Ni+Ni to Zr+Zr, for which the compound system decays primarily by charged-particle evaporation. In order to study heavier systems, it is, however, necessary to measure also the fraction of the decay that goes into fission fragments. In the present work we have, therefore, measured the fission cross section of {sup 16}O+{sup 197}Au down to unprecedented far sub-barrier energies using a large position sensitive PPAC placed at backward angles. The preliminary cross sections will be discussed and compared to earlier studies at near-barrier energies. No conclusive evidence for sub-barrier hindrance was found, probably because the measurements were not extended to sufficiently low energies.

Authors:
; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
947978
Report Number(s):
ANL/PHY/CP-118623
TRN: US0901488
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Conference
Resource Relation:
Conference: International Conference on Reaction Mechanisms and Nuclear Structure at the Coulomb Barrier (Fusion 06); Mar. 19, 2006 - Mar. 23, 2006; San Servolo, Venezia, Italy
Country of Publication:
United States
Language:
ENGLISH
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; COULOMB FIELD; CROSS SECTIONS; DECAY; EVAPORATION; FISSION; FISSION FRAGMENTS; NUCLEAR STRUCTURE; REACTION KINETICS

Citation Formats

Back, B. B., Jiang, C. L., Janssens, R. V. F., Henderson, D. J., Shumard, B. R., Lister, C. J., Peterson, D., Rehm, K. E., Tanihata, I., Tang, X., Wang, X. F., Zhu, S., and Physics. Fusion-fission of {sup 16}O+{sup 197}Au at sub-barrier energies.. United States: N. p., 2006. Web.
Back, B. B., Jiang, C. L., Janssens, R. V. F., Henderson, D. J., Shumard, B. R., Lister, C. J., Peterson, D., Rehm, K. E., Tanihata, I., Tang, X., Wang, X. F., Zhu, S., & Physics. Fusion-fission of {sup 16}O+{sup 197}Au at sub-barrier energies.. United States.
Back, B. B., Jiang, C. L., Janssens, R. V. F., Henderson, D. J., Shumard, B. R., Lister, C. J., Peterson, D., Rehm, K. E., Tanihata, I., Tang, X., Wang, X. F., Zhu, S., and Physics. Sun . "Fusion-fission of {sup 16}O+{sup 197}Au at sub-barrier energies.". United States. doi:.
@article{osti_947978,
title = {Fusion-fission of {sup 16}O+{sup 197}Au at sub-barrier energies.},
author = {Back, B. B. and Jiang, C. L. and Janssens, R. V. F. and Henderson, D. J. and Shumard, B. R. and Lister, C. J. and Peterson, D. and Rehm, K. E. and Tanihata, I. and Tang, X. and Wang, X. F. and Zhu, S. and Physics},
abstractNote = {The recent discovery of heavy-ion fusion hindrance at far sub-barrier energies has focused much attention on both experimental and theoretical studies of this phenomenon. Most of the experimental evidence comes from medium-heavy systems such as Ni+Ni to Zr+Zr, for which the compound system decays primarily by charged-particle evaporation. In order to study heavier systems, it is, however, necessary to measure also the fraction of the decay that goes into fission fragments. In the present work we have, therefore, measured the fission cross section of {sup 16}O+{sup 197}Au down to unprecedented far sub-barrier energies using a large position sensitive PPAC placed at backward angles. The preliminary cross sections will be discussed and compared to earlier studies at near-barrier energies. No conclusive evidence for sub-barrier hindrance was found, probably because the measurements were not extended to sufficiently low energies.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2006},
month = {Sun Jan 01 00:00:00 EST 2006}
}

Conference:
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